thermal spraying deposition efficiency The ratio of the weight of thermal spray

Thermal spraying deposition efficiency the ratio of

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thermal spraying deposition efficiency. The ratio of the weight of thermal spray deposit to the weight of sur- facing material sprayed, expressed as a percentage. thermal spraying gun. A device for heating, feeding, and directing the flow of surfacing material. thermal spraying operator. One who operates auto- matic, mechanized, or robotic thermal spraying equip- ment. Variations of this term are arc spraying operator , flame spraying operator , and plasma spraying operator . thermal stress. Stress in a material or assembly resulting from nonuniform temperature distribution or differen- tial thermal expansion. thermite crucible. The vessel in which the thermite reaction takes place. thermite mixture. A mixture of metal oxide and finely divided aluminum with the addition of alloying metals as required. thermite mold. A mold formed around the workpieces to receive molten metal. thermite reaction. The chemical reaction between metal oxide and aluminum producing superheated molten metal and a slag containing aluminum oxide. thermite welding (TW). A welding process producing coalescence of metals by heating them with super- heated liquid metal from a chemical reaction between a metal oxide and aluminum, with or without the application of pressure. Filler metal is obtained from the liquid metal. thermocompression bonding. A nonstandard term for hot pressure welding . threading and knurling , thermal spraying . A method of surface roughening in which spiral threads are prepared, followed by upsetting with a knurling tool. See Figure B.43(E). See also groove and rotary roughening , knurling , and rotary roughening . throat area , resistance welding . The region bounded by the physical components of the secondary circuit of a welding machine. throat crack . A crack in the throat of a fillet weld. See Figure B.33. throat depth , resistance welding . The distance from the centerline of the electrodes or platens to the nearest point of interference for flat sheets. throat height , resistance welding . The minimum dis- tance between the arms of the welding machine throughout the throat area. throat length. A nonstandard term when used for con- stricting orifice length . throat of a groove weld. A nonstandard term for groove weld size . throat opening. A nonstandard term for throat height . tie-in , n., fusion welding . The junction of weld metal and base metal or prior weld metal where fusion is intended. tie-in , v., fusion welding . To manipulate the welding pro- cess at the junction of the weld metal and base metal or weld metal to facilitate fusion. TIG welding. A nonstandard term for gas tungsten arc welding . tinning. A nonstandard term when used for precoating for soldering. tip. See cutting tip and welding tip . tip skid. A nonstandard term for electrode skidding . T-joint. A joint type in which the butting end of a work- piece is aligned approximately perpendicular with either its surface or the surface of a nonbutting work- piece. See Figures B.1(C), B.2(C), and B.10(F). See also skewed joint .
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AWS A3.0M/A3.0:2010 44 toe crack. A crack observed at the weld toe. See Figures B.32(A) and B.33(A).
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